Like I said, school gyms upstate. And coordinate with FEMA to get them supplies within a couple of days.
You, apparently, are the type of person New Orleans had in place for disaster planning.
Drop the personal attacks. You are sitting there and saying "Why didnt the city get these people out of new orleans?" and Im saying that most people affected are poor, didnt want to leave. No city in America is going to be able to evacuate a MILLION people out of this area. yeah, put them in buses and bus them north. Sure, but everyone who WANTED to get out did leave and if they couldnt leave they put them in the strongest building in new orleams. Some people just didnt heed the warning and are now paying for it. Im so sorry that you were expecting the mayor of new Orleans to put on a superman costume and forcefully remove people who didnt care about leaving in the first place.
Anywhere is better then trap on a roof in rising waters. Texas is close by and we are generious folk here. Finding temporary housing for 80,000 or 500,000 is doable.